Patent GB-307216-A (GB)
Title: Improvements in signature stapling or discontinuous wire stitching machines
IPC: B42B4/00
Filed: 1928-03-09
Abstract: 307,216. Belluche, E. W., and Greene, F. J. March 9, 1928. Signature gatherers and the like; stapling, stitching, and like bonding devices.-The stitcher mechanism of a signature stapling or discontinuous wire-stitching machine is rendered in operative when the group of signatures presented thereto contains less than a predetermined number. Trip mechanism is held inoperative by the passage of a signature and is set, by the failure of a signature to pass a station, to actuate other trip mechanism to declutch the drive of the stitcher mechanism. As shown, Fig. 1, an endless chain conveyer of inverted V-shaped elements 39, and driven by a pulley 44, carries an arcuateshaped pusher element 47 adapted to remove a signature from each of a number of stations 48 supported above the path of the conveyer, there being as many stations as there are signatures to a completed book. Each signature as it is passed off the station by the pusher member 47 is passed under the free bent end of a finger 59, Fig. 7, which normally rests in a slot in a plate 50 supported in a plane with, but apart from one, side of the station 48 and tilts this finger to move, through a system of pivoted levers 63, 64, 66, a shoe 67 and move it out of the plane of one end of the pusher member 47 in which it normally lies. The member 47 is detachably held by a spring in an aperture 71 in one of the conveyer members 39 and is bored to receive a trip member 69 longer than itself so that it projects from one end or the other. If a signature is passed from the station the shoe 67 is moved aside and the trip member 69 projects beyond the end of the pusher member 47 at which it is set, whereas absence of a signature from a station moves the trip member through the pusher member, by the shoe 67, tc project at the other side, where it finally contacts with one end of a bell-crank lever 73 adjustably positioned near the saddle or table 11 of the stitcher mechanism. As the pusher member 47 with the trip 69 set passes the lever 73 it turns this lever on its pivot, againt a spring, to free a lever 79, Fig. 2, which turns on its pivot 80 under a spring 95 to elevate the outer end 87 of a bell-crank lever and position the end of a rod 88 in the path of a lever 90 to arrest the rocking movement of a. shaft 29. Presentation of a group of signatures to the stitcher mechanism moves a dog 33, pivoted to the machine frame 10, out of a recess 32, where it normally restains movement of a rocker bar 31 joining the ends of rocker arm 30 on the shaft 29, and permits rocking movement of a lever 28, rod 26 and bell-crank lever 23 to move a lever 19, which holds a pin 18 on a spring-pressed block 16, out of its holding position, and permit movement of the block 16 to release a pin clutch mechanism 15 through which the actuating rod 14 of the stitcher mechanism is driven by an eccentric (not shown). If the group of signatures is incomplete, oscillating movement of the lever 28, 90 about its pivot 29, and engagement of the clutch 15, is prevented by the rod 88. The trip 69 is reset, before it reaches the first station 48, by a finger 97. Several pusher members 47 may be provided if desired.